12 of mains power Output voltage range 220±1% Vac Battery inverter Output efficiency ≥88 % Battery inverter Rated output frequency 50±0.5% Hz Battery inverter, bypass mode is the same as that of mains power Output waveform Pure sine wave Battery inverter Output waveform distortion rate ≤3 % Battery inverter, linear load 2.2 Mains / Inverter conversion time ≤8 ms 3 Protection characteristics Serial number Project Technical requirement Company Remarks 3.1 Mains input undervoltage switching ≤165 Vac Return difference ≥ 10vac 3.2 Mains input overvoltage switching ≥260 Vac Return difference ≥ 10vac 3.3 Battery low voltage alarm 44+/-1V Vdc 3.4 Battery high voltage alarm 58+/-1V Vdc 3.5 Battery low voltage protection point ≤40 Vdc 3.6 Battery overvoltage protection point ≥60 Vdc 3.7 Output load protection 105%≤load≤125% Protection after 1 minute —— 125%≤Load≤200 % Protection after 600ms —— 3.8 Over temperature protection Yes —— Automatic recovery 3.9 Output short circuit protection Yes —— Short circuit is prohibited when mains power is connected 3.10 Battery reverse connection protection Yes —— Reverse connection is prohibited for models with charging 3.11 Output overvoltage protection ≥245 Vac Battery inverter